Improvement in saw-guides for circular-saw mills



w. M. FERRY. SAW-GUIDES FORCIRC'U'LAR SAW-MILLS.

No .173,92'7. rammed Feb. 22,1876.

'Ulvrrrnn STATES PATENT firrron.

WILLIAM M. FERRY, or GRAND HAVEN, MICHIGAN.

IMPROVEMENT IN SAW-GUIDES FOR CIRCULAR-SAW MILLS.

Specification forming part of Letters Patent No. 173,927, dated February22, 1876; application filed August 27, 1675. p a

To all whom it may concern Be it known that I, WILLTAM M. FERRY, ofGrand Haven, in the county of Ottowa and State of Michigan, have invented an Improvement in Saw-Guides for Circular-Saw Mills, of which thefollowing is a specification:

My invention has for its object to provide the saw-frame of acircular-saw mill with a device or devices by means of which the sawyercan adjust the saw-guides quickly, accurately,

and with perfect safety from his post behind the saw, and while it isrunning.

The invention consists in an adjustable con nection between each slideand its screw-rod, whereby the saw-guides can be used with saws ofvarious diameters without altering the length of the screw-bars; also,in making the outer guide in one piece, which can be readily detachedfrom the guideframe by simply running the wedge below out of itsdiagonal slot, first uncoupling the slide from the screw-rod.

Figure 1 is a perspective view, showing a portion of the saw-frame of acircular-saw mill fitted with my improved saw-guides, the cover of theguide-frame being removed. Fig. 2 is an enlarged plan of the guides andtheir adjusting devices. Fig. 3 is a perspective view of a part of aslide and its wedge. Fig. 4 is a bottom plan of the saw-guides.

In the drawing, A represents the saw-frame of a circular-saw mill. B isone of the boxes through which is journaled the arbor 0, carrying a saw,D. E is a guide-frame, cast with two longitudinal ways or recesses, andis adjustably secured to the side of the saw-frame, near thecutting-periphery of the saw, by means of bolts a, through slots 12 inits bedplate. In the ways of the guide-frame are laid two sliding bars,F F, each having a rib, c, diagonally placed across its upper surface. GG are the saw-guides, laid in slots across the ways of the frame E,resting on the bars F F. In the under side of each guide there 1s adlagonal groove, d, in which is received the rib c of the slide below.The bar F, when moved longitudinally, actuates the guide G in thedirection of its lengththat is to say, across the bar F. In like mannerthe bar 13" actuates the bar G. The guide Gr is straight, and its outerend impinges upon and guides the inner face of the saw, near thecuttingperiphery. The guide G is bent to a right angle, with its outerextremity turned slightly inward, to impinge upon the outer face of thesaw and guide it. At the rear end of the sawframe, on the saw sidethereof-4f that be, as is usually the case, the sawyers post-a bracket,H, is erected, through which two hand-wheel nuts, I 1, are journaled,through which nuts the screw-rods J J are respectively tapped, and areconnected with the bars F F in the following manner: The rear ends ofsaid bars are bent outwardly, and a sleeve, f, is longitudinally formedon the end of each to receive the end of the screw-rod, which is'secured therein by a pin, 0, sitting into a transverse keyway on lherod. As saws of various diameters are used on the arbor at varioustimes, the rods are disconnected from the bars, and the guide-frame isadjusted on the saw-frame so as to bring the guides into their properposition:; and, as several keyseats are cut on each rod, it is an easymatter to couple the rods to the sleeves again; and any adjustment ofthe guides to or from the saw can then be made by means of the handnuts,which the sawyer can turn in perfect safety while the saw is running,without the loss of much time consumed in adjusting the guidesheretofore used.

It is well known, to all conversant with the manufacture of lumber withcircular mills, that the great majority of accidents and loss of lifeand limb occur to sawycrs while adjusting the saw-guides, who haveheretofore been compelled to make such adjustments while close to thecutting-edge of the saw while in motion. WVith my improved guides, itwill be seen that the mechanism for adjusting them is so far removedfrom the cuttingperiphery of the saw as to preclude the possibility ofaccidents. It will also be noticed that these adjustments of the guidescan be efi'ected very quickly, which is an important feature, as, owingto the filing of the saw, or a peculiarity of the grain of the log, thesaw will have an incline to or from the log, which must be counteractedby an adjustment of the guides.

The viscous inner bark of logs and slivers are apt to jam between theguides and the saw, causing the latter to heat. These obstructions arequickly removed by easing up the jammed guide for a moment, when saidobstructions will drop out.

In changing saws it is necessary to remove the outer guide, which can bequickly done by unconplin g the bar from its screw-rod and sliding itforward until the rib of said bar is out of the groove in the guide,when the lat ter can be entirely withdrawn from the guideframe.

What I claim as my invention is 1. The sleeve f on the rear end of eachguidebar, and a pin or key, 0, for adjustably connectingthe same Withits screw-rod, substantially as described. v

2. The guide G, made in one piece, as described, and adapted to beremoved from the guide-frame, and adapted to the saw, substantially asset forth.

WILLIAM M. FERRY.

Witnesses:

H. F. EBERTS, H. S. SPRAGUE.

